I've finished main SP campaign and must say that this game promise a lot at the beginning but the dumb AI kills a lot of fun later. There are some missions when squadmates under your command are more of a problem than the enemy (try to get them to set up an ambush...). It makes me wonder, when the developers will realize that they can endlessly add new maps, jets, tanks, ships etc. to their sandbox but without proper AI to set this in motion it doesn't make any sense (in terms of single player).